/Engine/Source/Runtime/MeshDescription/Public/MeshDescription.h
Set the UV indices for this triangle
void SetTriangleUVIndices ( const [FTriangleID](API\Runtime\MeshDescription\FTriangleID) TriangleID, [TArrayView](API\Runtime\Core\Containers\TArrayView)< const [FUVID](API\Runtime\MeshDescription\FUVID) > UVIDs, int32 UVChannel )